Spark Plugs: Service Intervals

How often do spark plugs need to be changed? Discussing the importance of recommended service intervals.

How often do spark plugs need to be changed? 12,000 miles, 30,000 miles, or 100,000 miles?
The answer is, ironically, all the above. All spark plugs are not created equal. So, if you were under the impression that all spark plugs will last 100,000 miles, you are, well, wrong.

Let’s look at it by the numbers. For vehicles built since 2000, over 30% of cars and operation a day have a spark plug service interval of less than 100,000 miles. That represents over 73 million vehicles, with nearly two-thirds of them having a service life under 60,000 miles.

But there is a bigger story at play here. While NGK’s use of precious metals and efficient tip designs have given rise to spark plug life expectancy, the demands of today’s modern engines continue to shorten that service life. Fuel economy demands, government regulations, and performance expectations have all taken their toll on the lifecycle of spark plugs, And that trend is expected to continue as direct injection, turbo charging, smaller packaging, and higher engine operating temperatures become more prevalent.

You might be one of the two-thirds who are running spark plugs with the service life of 100,000 miles, and have no immediate need to be concerned. Yet. But there are potentially 68 million others who are putting their vehicles and pocketbooks at risk.

Engine performance conditions such as poor acceleration, reduced fuel economy, hard starts, misfires, and surging may be signs that spark plugs are reaching the end of their life cycle. If ignored that can negatively impact other ignition components such as wire sets, ignition coils, and the ECM which can lead to engine failure and unnecessary costly repairs.

How can all of this be avoided? Look to NGK spark plugs, the ignition specialist. NGK is the only OE a spark plug manufacturer to provide recommended service intervals for spark plugs. This information can be easily obtained through the NGK spark parts finder, and is also supported through the company’s catalog content provided to your local parts provider. As the industry leader in spark plug ignition technology, NGK is committed to providing countermen, technicians, and consumers with valuable service interval recommendations for spark plug life cycles as specified by domestic and import manufacturers. Trust NGK, the ignition specialist.